Add 30/15 and 21/28
1st number: 2 0/15, 2nd number: 21/28
30/15 + 21/28 is 11/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
30/15 = 30 × 28/15 × 28 = 840/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
21/28 = 21 × 15/28 × 15 = 315/420 - Add the two like fractions:
840/420 + 315/420 = 840 + 315/420 = 1155/420 - 1155/420 simplified gives 11/4
- So, 30/15 + 21/28 = 11/4
In mixed form: 23/4
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